Spektrum RPM Sensor Made by Spektrum; Spektrum is a USA based company; parts are sourced from Global producers Spektrum part number 1452; UPC 605482011386 This item works with: Associated Mini MGT 3.0 RTR, MTA4, Monster GT, Monster GT 4.6, RC-10GT2, RC-8 buggy, RC-8 Truck, SC-8 Short Course 8, TC-3 Nitro Sedan; HPI Nitro 10863 Monster King 4X4, Baja 5B, Baja 5T Truck, Bullet MT or ST, Firestorm, RS4 Nitro MT2 4wd, RS4 RTR3 EVO, Savage X, Savage X 4.6, Savage XL, Trophy; Kyosho DBX, Fazer GP 1/10, Gigga Crusher, GT Inferno Sedan, GT2 Inferno Audi Vette, Inferno ST RTR US version, Mad Force, Mega Force, MP6, 7.5,777, MP9, Nitro Blizza